package com.etone.smartAudit.utils.gis;


/**
 * 各地图API坐标系统比较与转换;
 * WGS84坐标系：即地球坐标系，国际上通用的坐标系。设备一般包含GPS芯片或者北斗芯片获取的经纬度为WGS84地理坐标系,
 * 谷歌地图采用的是WGS84地理坐标系（中国范围除外）;
 * GCJ02坐标系：即火星坐标系，是由中国国家测绘局制订的地理信息系统的坐标系统。由WGS84坐标系经加密后的坐标系。
 * 谷歌中国地图和搜搜中国地图采用的是GCJ02地理坐标系; BD09坐标系：即百度坐标系，GCJ02坐标系经加密后的坐标系;
 * 搜狗坐标系、图吧坐标系等，估计也是在GCJ02基础上加密而成的。 chenhua
 */
public class GpsUtil {

    public static double pi = 3.1415926535897932384626;
    public static double xpi = 3.14159265358979324 * 3000.0 / 180.0;
    public static double a = 6378245.0;
    public static double EARTH_DIAMETER = 6371.01 * 1000; // 地球平均半径 meters
    public static double ee = 0.00669342162296594323;
    public static double[] offset1 = {1.289059486E7, 8362377.87, 5591021, 3481989.83, 1678043.12, 0};
    public static double[][] offset2 = {
            {1.410526172116255E-8, 8.98305509648872E-6, -1.9939833816331, 200.9824383106796, -187.2403703815547, 91.6087516669843, -23.38765649603339, 2.57121317296198, -0.03801003308653, 1.73379812E7},
            {-7.435856389565537E-9, 8.983055097726239E-6, -0.78625201886289, 96.32687599759846, -1.85204757529826, -59.36935905485877, 47.40033549296737, -16.50741931063887, 2.28786674699375, 1.026014486E7},
            {-3.030883460898826E-8, 8.98305509983578E-6, 0.30071316287616, 59.74293618442277, 7.357984074871, -25.38371002664745, 13.45380521110908, -3.29883767235584, 0.32710905363475, 6856817.37},
            {-1.981981304930552E-8, 8.983055099779535E-6, 0.03278182852591, 40.31678527705744, 0.65659298677277, -4.44255534477492, 0.85341911805263, 0.12923347998204, -0.04625736007561, 4482777.06},
            {3.09191371068437E-9, 8.983055096812155E-6, 6.995724062E-5, 23.10934304144901, -2.3663490511E-4, -0.6321817810242, -0.00663494467273, 0.03430082397953, -0.00466043876332, 2555164.4},
            {2.890871144776878E-9, 8.983055095805407E-6, -3.068298E-8, 7.47137025468032, -3.53937994E-6, -0.02145144861037, -1.234426596E-5, 1.0322952773E-4, -3.23890364E-6, 826088.5}
    };

    /**
     * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
     *
     * @param lat
     * @param lon
     * @return
     */
    public static Gps gps84_To_Gcj02(double lat, double lon) {
        if (outOfChina(lat, lon)) {
            return null;
        }
        double dLat = transformLat(lon - 105.0, lat - 35.0);
        double dLon = transformLon(lon - 105.0, lat - 35.0);
        double radLat = lat / 180.0 * pi;
        double magic = Math.sin(radLat);
        magic = 1 - ee * magic * magic;
        double sqrtMagic = Math.sqrt(magic);
        dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
        dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
        double mgLat = lat + dLat;
        double mgLon = lon + dLon;
        return new Gps(mgLat, mgLon);
    }

    /**
     * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
     */
    public static Gps gcj_To_Gps84(double lat, double lon) {
        Gps gps = transform(lat, lon);
        double lontitude = lon * 2 - gps.getWgLon();
        double latitude = lat * 2 - gps.getWgLat();
        return new Gps(latitude, lontitude);
    }

    /**
     * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
     *
     * @param gg_lat
     * @param gg_lon
     */
    public static Gps gcj02_To_Bd09ll(double gg_lat, double gg_lon) {
        double x = gg_lon, y = gg_lat;
        double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * xpi);
        double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * xpi);
        double bd_lon = z * Math.cos(theta) + 0.0065;
        double bd_lat = z * Math.sin(theta) + 0.006;
        return new Gps(bd_lat, bd_lon);
    }

    /**
     * * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param
     * bd_lat * @param bd_lon * @return
     */
    public static Gps bd09ll_To_Gcj02(double bd_lat, double bd_lon) {
        double x = bd_lon - 0.0065, y = bd_lat - 0.006;
        double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * xpi);
        double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * xpi);
        double gg_lon = z * Math.cos(theta);
        double gg_lat = z * Math.sin(theta);
        return new Gps(gg_lat, gg_lon);
    }

    /**
     * (BD-09)-->84
     *
     * @param bd_lat
     * @param bd_lon
     * @return
     */
    public static Gps bd09ll_To_Gps84(double bd_lat, double bd_lon) {

        Gps gcj02 = GpsUtil.bd09ll_To_Gcj02(bd_lat, bd_lon);
        Gps map84 = GpsUtil.gcj_To_Gps84(gcj02.getWgLat(), gcj02.getWgLon());
        return map84;
    }

    /**
     * gps84-->(BD-09)
     *
     * @param lat
     * @param lon
     * @return
     */
    public static Gps gps84_To_Bd09ll(double lat, double lon) {

        Gps gcj02 = GpsUtil.gps84_To_Gcj02(lat, lon);
        if (gcj02 == null) return null;
        Gps bd09ll = GpsUtil.gcj02_To_Bd09ll(gcj02.getWgLat(), gcj02.getWgLon());
        return bd09ll;
    }

    /**
     * bd09mc -> bd09ll -> gcj02 -> wgs84
     *
     * @param mc_lat
     * @param mc_lon
     * @return
     */
    public static Gps bd09mc_To_Gps84(double mc_lat, double mc_lon) {
        Gps bd09ll = GpsUtil.bd09mc_To_Bd09ll(mc_lat, mc_lon);
        Gps gcj02 = GpsUtil.bd09ll_To_Gcj02(bd09ll.getWgLat(), bd09ll.getWgLon());
        Gps map84 = GpsUtil.gcj_To_Gps84(gcj02.getWgLat(), gcj02.getWgLon());
        return map84;
    }

    /**
     * bd09mc to bd09ll
     *
     * @param mc_lat
     * @param mc_lon
     * @return
     */
    public static Gps bd09mc_To_Bd09ll(double mc_lat, double mc_lon) {

        double[] offset = null;

        for (int i = 0; i < offset1.length; i++) {
            if (mc_lat >= offset1[i]) {
                offset = offset2[i];
                break;
            }
        }

        double lng = offset[0] + offset[1] * Math.abs(mc_lon);
        double lat = Math.abs(mc_lat) / offset[9];
        lat = offset[2] + offset[3] * lat + offset[4] * lat * lat + offset[5] * lat * lat * lat + offset[6] * lat * lat * lat * lat + offset[7] * lat * lat * lat * lat * lat + offset[8] * lat * lat * lat * lat * lat * lat;
        lng = lng * (0 > mc_lon ? -1 : 1);
        lat = lat * (0 > mc_lat ? -1 : 1);

        return new Gps(lat, lng);
    }


    /**
     * bd09mc -> bd09ll -> gcj02, 将 bd09mc 坐标转换成 GCJ-02 坐标
     *
     * @param mc_lat
     * @param mc_lon
     */
    public static Gps bd09mc_To_Gcj02(double mc_lat, double mc_lon) {
        Gps bd09ll = GpsUtil.bd09mc_To_Bd09ll(mc_lat, mc_lon);
        Gps gcj02 = GpsUtil.bd09ll_To_Gcj02(bd09ll.getWgLat(), bd09ll.getWgLon());
        return gcj02;
    }

    public static boolean outOfChina(double lat, double lon) {
        if (lon < 72.004 || lon > 137.8347) {
            return true;
        }
        if (lat < 0.8293 || lat > 55.8271) {
            return true;
        }
        return false;
    }

    public static Gps transform(double lat, double lon) {
        if (outOfChina(lat, lon)) {
            return new Gps(lat, lon);
        }
        double dLat = transformLat(lon - 105.0, lat - 35.0);
        double dLon = transformLon(lon - 105.0, lat - 35.0);
        double radLat = lat / 180.0 * pi;
        double magic = Math.sin(radLat);
        magic = 1 - ee * magic * magic;
        double sqrtMagic = Math.sqrt(magic);
        dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
        dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
        double mgLat = lat + dLat;
        double mgLon = lon + dLon;
        return new Gps(mgLat, mgLon);
    }

    public static double transformLat(double x, double y) {
        double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
        ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
        ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
        ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
        return ret;
    }

    public static double transformLon(double x, double y) {
        double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
        ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
        ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
        ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;
        return ret;
    }

    /**
     * 两点间距离
     * @param lon1
     * @param lat1
     * @param lon2
     * @param lat2
     * @return
     */
    public static double distance(double lon1, double lat1, double lon2, double lat2) {
        double x = Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * Math.cos((lon1 - lon2) * Math.PI / 180);
        double y = Math.sin(lat1 * Math.PI / 180) * Math.sin(lat2 * Math.PI / 180);
        double s = x + y;
        if (s > 1) { s = 1; }
        if (s < -1) { s = -1; }
        double alpha = Math.acos(s);
        return alpha * EARTH_DIAMETER;
    }
}